and outlet piping must be as large as the connections or larger. Piping that is smaller than the purifier con- nections will increase pressure drop and reduce breath- ing air flow.
Install a pressure gauge at the purifier inlet to indicate purifier operating pressure. Install shutoff valves be- fore and after the purifier. Install a depressurization valve between the purifier and the outlet shutoff valve to vent internal pressure so that maintenance can be performed safely.
If bypass piping is installed around the purifier, a sec- ond purifier must be installed in the bypass line.
WARNING
Without a second purifier in the bypass line air in the bypass will not be purified.
After piping has been installed, gradually pressurize the system. Check and correct all connections for leaks before operating the purifier.
Drain Piping
Two electronic drain valves automatically discharge accumulated liquids from the coalescing filter. Drain lines are located inside the cabinet for shipping. Uncoil both lines; run the lines to a collection tank or an envi- ronmentally approved disposal system. Secure the free
ends to prevent the lines from whipping when the drains discharge.
If longer drain lines are required, 516 O.D. flexible plastic tubing up to ten feet long may be used. For dis- charge lines longer than ten feet use 3 4 pipe or larger as required to avoid back pressure in the drain lines.
Electrical Connections
Electrical service access is clearly marked on the puri- fier. Connect a fused AC power supply to the power connections in the electrical enclosure. Run the wire through the conduit connection. See Table III and Fig- ures 4a, 4b and 4c for electrical system details.
PURIFICATION PROCESS
Figure 1 illustrates the major components of the puri- fier air and refrigerant circuits. These circuits work to- gether to purify inlet air as follows:
Air enters the purifier from the compressor/after- cooler.
The chiller
Figure 1. Air and Refrigerant Flow Diagram
4 | Pyramid 8000® Series Purifiers (Bulletin 289) |
